Lenze i550 inverter
Register map(s) for this device, with a note of how far each has been checked. Addresses are
0-based, as on the wire. Scale and byte order are confirmed only at the hardware-verified rung.
coherence-checked
Round-trips through a real Modbus stack with no overlapping addresses and a word-order-sensitive codec — the map is internally coherent and wire-decodable. Does NOT prove byte-order or scaling match a real device: the emulator is seeded from the map's own types, so a uniformly wrong byte-order still round-trips. Only hardware-verified confirms byte-order/scale on the wire.
| point | address (0-based) | type | scale | unit |
|---|
| output_frequency | 1000 | I16 | 0.1 | |
| actual_current | 1030 | U16 | 0.1 | |
| motor_voltage | 1060 | U16 | 1 | |
| dc_bus_voltage | 1050 | U16 | 1 | |
| heatsink_temperature | 1171 | I16 | 0.1 | |
| error_code | 1500 | U16 | 1 | |
link settings as documented (unverified): RTU/TCP; For Modbus RTU, the baud rate and parity are detected automatically when DIP switches are in the OFF position. Otherwise, node address and baud rate can be set via DIP switches or parameters P510.01 and P510.02.
⚠ Improper installation of the safety engineering system can cause an uncontrolled starting action of the drives. — Starkest reads only; we never write a control register.
bench facts as documented (unverified)
| terminals | Spring terminal, pluggable |
| termination | DIP switch 'R' to ON at the first and last physical node |
| connector | X216 |
| wiring notes | Max. cable cross-section: 2.5 mm², Stripping length: 10 mm, Required tool: 0.4 x 2.5 screwdriver |
| power | 0.25 ... 132 kW, 1-phase 120 V (90 V ... 132 V, 45 Hz ... 65 Hz), 1-phase 230/240 V, 3-phase 230/240 V, 3-phase 400 V, 3-phase 480 V |
| certifications | Low-Voltage Directive 2014/35/EU, EN IEC 61800-5-1, UL 61800-5-1, CAN/CSA C22.2 No.274, EMC Directive 2014/30/EU, EN IEC 61800-3 |
| doc revision | 01/2023 · EN |
field reports — community-sourced, unverified (checked 2026-06-11)
- Users attempting to integrate the Lenze i550 via Modbus RTU often encounter communication failures (such as warning code W81a2 'Modbus: incorrect request by master' or exception code 8602) due to address offset confusion. The device requires a -1 offset from the documented register number when using native Modbus PDU addressing. [source]
- confirmed: For Modbus RTU, the baud rate and parity are detected automatically when DIP switches are in the OFF position. Otherwise, node address and baud rate can be set via DIP switches or parameters P510.01 and P510.02. — confirmed by Lenze i550 Cabinet Frequency Inverter User Guide
- confirmed: Connector X216, spring terminal, pluggable, max cable cross-section 2.5 mm², stripping length 10 mm, required tool 0.4 x 2.5 screwdriver, termination DIP switch 'R' to ON — confirmed by Lenze i550 Cabinet Frequency Inverter User Guide
- confirmed: Power range 0.25 ... 132 kW, 1-phase 120 V, 1-phase 230/240 V, 3-phase 230/240 V, 3-phase 400 V, 3-phase 480 V — confirmed by Lenze i550 Cabinet Frequency Inverter User Guide
- confirmed: Register map: output_frequency @ 1000, actual_current @ 1030, motor_voltage @ 1060, dc_bus_voltage @ 1050, heatsink_temperature @ 1171, error_code @ 1500 — confirmed by Lenze parameter-to-Modbus mapping formula: Register = (Parameter * 10) + Subindex (e.g., P100.00 = 1000, P117.01 = 1171)
The trust ladder
Each rung states what it proved and what it did not. Gray until proven; green is earned by hardware only.
- generated — A prompt produced it. Unproven — anyone can regenerate this.
- structure-verified — Decode path is structurally sound (addresses, widths, finite values). Does NOT prove word order or scaling.
- coherence-checked — Round-trips through a real Modbus stack with no overlapping addresses and a word-order-sensitive codec — the map is internally coherent and wire-decodable. Does NOT prove byte-order or scaling match a real device: the emulator is seeded from the map's own types, so a uniformly wrong byte-order still round-trips. Only hardware-verified confirms byte-order/scale on the wire.
- hardware-verified (software-key) x1 — Matched a real device with operator-attested readings as ground truth — the only rung that confirms word order + scaling on the wire.